IBM is doing most of the work wrt. this backend to support their AIX systems. Support for other platforms mostly comes along for the ride.
(For that matter, LLVM might well pick up a backend that has sufficient maintenance to keep up with internal code changes, regardless of "production" concerns. See RISC-V as an example - obviously it's not seeing a lot of production use, but LLVM does include it.)
(For that matter, LLVM might well pick up a backend that has sufficient maintenance to keep up with internal code changes, regardless of "production" concerns. See RISC-V as an example - obviously it's not seeing a lot of production use, but LLVM does include it.)